package com.sky.service.impl;

import com.alibaba.druid.support.json.JSONUtils;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * ClassName: UserServiceImpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Author BuTang
 * @Create 2023/10/31 13:12
 * @Version 1.0
 */
@Service
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {

        //先调用微信接口，获取openid
        String openid = getOpenid(userLoginDTO);

        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否为新用户，如果是新用户的则添加到数据库
        User user = userMapper.getByOpenid(openid);
        if (user == null ){
            user = User.builder()
                    .createTime(LocalDateTime.now())
                    .openid(openid)
                    .build();

            userMapper.insert(user);

        }
        return user;
    }


    /**
     * 调用微信接口，从微信接口回去openid
     * @param userLoginDTO 小程序端发送code
     * @return openid
     */
    @Override
    public String getOpenid(UserLoginDTO userLoginDTO) {
        //获取code
        String code = userLoginDTO.getCode();

        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }


}
